GB627314A - Improved carrier wave telephone system - Google Patents

Improved carrier wave telephone system

Info

Publication number
GB627314A
GB627314A GB30689/46A GB3068946A GB627314A GB 627314 A GB627314 A GB 627314A GB 30689/46 A GB30689/46 A GB 30689/46A GB 3068946 A GB3068946 A GB 3068946A GB 627314 A GB627314 A GB 627314A
Authority
GB
United Kingdom
Prior art keywords
carrier
subscriber
frequency
station
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB30689/46A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB627314A publication Critical patent/GB627314A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5437—Wired telephone

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB30689/46A 1945-10-27 1946-10-15 Improved carrier wave telephone system Expired GB627314A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US625083A US2510271A (en) 1945-10-27 1945-10-27 Power line carrier telephone system

Publications (1)

Publication Number Publication Date
GB627314A true GB627314A (en) 1949-08-05

Family

ID=24504508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30689/46A Expired GB627314A (en) 1945-10-27 1946-10-15 Improved carrier wave telephone system

Country Status (4)

Country Link
US (1) US2510271A (enrdf_load_stackoverflow)
FR (1) FR942516A (enrdf_load_stackoverflow)
GB (1) GB627314A (enrdf_load_stackoverflow)
NL (1) NL77421C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6310639B1 (en) 1996-02-07 2001-10-30 Hewlett-Packard Co. Printer printhead

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604544A (en) * 1949-12-30 1952-07-22 W C Dillon & Company Inc Carrier telephone system with audio-frequency signaling
BE502150A (enrdf_load_stackoverflow) * 1950-03-27 1900-01-01
GB748783A (enrdf_load_stackoverflow) * 1953-06-12
US2927966A (en) * 1957-09-27 1960-03-08 Bell Telephone Labor Inc Carrier telephone systems with carrier-shift signaling
US3962547A (en) * 1975-05-27 1976-06-08 Westinghouse Electric Corporation Repeater coupler for power line communication systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1603657A (en) * 1924-04-07 1926-10-19 Western Electric Co Power-line signaling
US2292222A (en) * 1939-12-28 1942-08-04 Elmer G Van Name Two-way radio communication system
US2294905A (en) * 1941-04-19 1942-09-08 Bell Telephone Labor Inc Power line telephone system
US2289048A (en) * 1941-06-19 1942-07-07 Bell Telephone Labor Inc Power line carrier frequency telephone system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6310639B1 (en) 1996-02-07 2001-10-30 Hewlett-Packard Co. Printer printhead

Also Published As

Publication number Publication date
FR942516A (fr) 1949-02-10
NL77421C (enrdf_load_stackoverflow)
US2510271A (en) 1950-06-06

Similar Documents

Publication Publication Date Title
US2289048A (en) Power line carrier frequency telephone system
US2264396A (en) Power line carrier frequency telephone system
US2516211A (en) Filter connecting telephone transmitter to power line during calls
US2535446A (en) Carrier communication system
GB553225A (en) Power line telephone system
GB627314A (en) Improved carrier wave telephone system
US2894121A (en) Radiotelephone system featuring switching circuit for portable radio transmitter andreceiver
US3366744A (en) Remote telephone extension system
US2721897A (en) Carrier wave communication system
GB651781A (en) Pulse telecommunication system
MXPA03004265A (es) Metodos y aparatos para simultaneamente comunicar voz y datos en un sistema de telefono inalambrico analogo.
US2264397A (en) Power line carrier frequency telephone system
US3449750A (en) Duplex radio communication and signaling apparatus for portable telephone extension
GB627766A (en) Improved carrier wave telephone system
GB570415A (en) Radio signalling system calling arrangements
US1528010A (en) Radio signaling system
US2249156A (en) Telephone system
US4471168A (en) Wireless telephone extension unit with combination filter/oscillator unit
US3909550A (en) Key telephone systems
GB741541A (en) A simplex radio-telephone system comprising a fixed station and a plurality of mobile stations
US3366745A (en) Remote telephone extension system
JPS55105461A (en) Artificial reply device of telephone set
JPS5923140B2 (ja) Ａｃ電力線搬送波増設電話システム
GB793543A (en) Improvements in or relating to telephone signalling systems
US4004107A (en) Telephone circuit to eliminate use of a hold button